INDEX. 191 



of four years, 380 ; of five years, 38 1 ; of six years, 383 ; of seven 

 years, 384? ; of eight years, ib. 



Rotations, questions connected with the subject of, 386 ; general de- 

 ductions respecting, 388. 



Rotherham or Yorkshire plough, the, 119. 



Rowen, or after-grass, 421 ; when a valuable resource, ib. ; worth of, 

 in spring, 422. 



Row-culture, implements for, 115. 



by drilling, 333. 



Ruta-baga, crops of, raised by Mr Hunter, Add. 108. 



Rust or mildew, its nature and appearance, Add. 63 ; causes, ib. ; 

 manner in which communicated, Add. 64 ; remedies, Add. 65 ; 

 prevented by cultivating hardy kinds of wheat, ib. ; by sowing 

 wheat early, ib. ; thin crops more subject to it than thick, Add. 

 66 ; prevented by treading the ground after sowing, Add. 67 ; ad- 

 vantages in using saline manures as remedies against, Add. 68; 

 rare near the sea, ib. ; little known in Flanders, ib. ; plants most 

 favourable to the growth of, Add. 69 ; curious circumstance con- 

 nected with the, Add. 70 ; communicated solely by the roots, ib. 



Rye-grass, propriety of sowing with clover, 328 ; quantity of seed 

 for, ib. ; utility of, 435 ; objections to, how removed, ib. 



Sainfoin, excellence of, on poor sandy soils, 433 ; chalky soils how 

 to be cultivated for, 28. 



improvement from the culture of, 434 ; on what soils it 



thrives, ib. ; may be mixed with white clover, ib. 



layers, paring and burning necessary to old, 238. 



Salt, utility of, as a manure, 202 ; employed for improving arable 

 land, Add. 99; used for promoting the fertility of waste-land, 101. 



on the uses of, for agricultural purposes, Add. 99 ; a manure 



to arable land, ib. ; promotes the growth of vegetables, ib. ; modes 

 in which it has been successfully made use of, Add. 100; experi- 

 ments with foul, in Cheshire, and use of, in composts, ib. ; old or 

 condemned, how used in Cornwall, ib. ; applied to composts, a 

 more beneficial manure than lime, ib. ; experiment made with, at 

 the Abbey of St Pierre, Add. 1 01 ; how used in Flanders, ib. ; 

 promotes the fertility of waste land, ib. ; an effectual remedy against 

 smut, 102 ; preserves the seed from vermin, ib. ; promotes the ve- 

 getation of oily seeds, ib. ; increases the produce of pasture-land, 

 ib. ; improves the quality of hay, Add. 103. 



renders coarse food more nourishing, Add. 104 ; when to be 



given to cows, ib. ; very beneficial for horses, ib. ; preserves stock 

 from disease, ib. ; cures the botts in horses, ib. ; Mr Curwen's ex- 

 periments on, ib. ; proportions of, given to cattle, Add. 105 ; ad- 

 vantages of, to sheep, ib. ; quantities of, given in Spain and Great 

 Britain, ib.; prevents braxy, Add. 106; use of, for pigs in Ire- 

 land, ib. ; advantageously given to poultry, ib. ; general uses of, to 

 stock, ib. ; modes of giving it to stock, ib. ; prevents rust or blight 

 in wheat, ib. ; how used by the Rev. Mr Hoblyn, Add. 107 ; be- 

 nefits to agriculture on the reduction of the duties on, ib. 



